schermerhorn



June 8,1926. 1,588,192

H. L. SCHERME RHORN VARNI'SH TANK Filed June 8. 1925 '[nvemfor Harmon Lflc/zermer/zorw,

His Zilforngy Patented June 8, 19 26.

, UNITEDSTATES; PATENT. OFf-lCE l- Harmon L. 'soiannirnnnionn, F sorinnsotriinmin sw roan, nssroivon To GENERAL nnnornro COMPANY, A oonronii' rion. or New "2031:.

VARNISH TANK.

Application filed June 28,

My invention relates to tanks for varnish and the like, and has for its object the provision of condensing means which may be placed over a tank containing a volatile substance, as for instance a solvent which is beadded to a varnish, to eti'ectivelyprevent escape ofthe solvent in the form of vapor.

- In the making of various kinds of varnishes, it is the practice to cook the various materials making up the body of the varnish together after which a suitable solvent, such as gasoline, is added to'thin the mixture to the'desired gravity. The gasoline or'other solvent must be added while the prepared varnish is still at a high temperature and as a result rapid vaporization of the solvent takes place until the mixture has cooled somewhat. Obviously, when using an open tank this results in great waste of solvent and also a the hazard due to the escaping vapors.

In carrying out my invention, I provide a condensing hood which may be placed over the varnish tank alter the cookingoperation has been completed whereby the solvent vapors are condensed and returned to the tank.

For a more complete understanding of my invention reference should be had to the accompanyiijig drawing, the single figure of which a section view of a condensing hood embody g my invention. 7

Referring to the drawing, the various in. gredients forming the body of thevarnish are mixed and cooked in a suitable tank l0. i the cooking has been completed a con- Ji eel (lensing hood 11 is placed over the tank and the solvent. added. This condensing hood con'iprises a double walled, cone shaped portion 12 secured to the bottom of which is a cylindrical portion 13. The lower edge of portion 13 is provided with a: flange 1% which rests on the upper edge of the tank 10 and forms a support for the condensing hood when it is placed over the tank. A suitable cooling liquid, such as water, is circulated through the chamber formed hetween the double walls of the conical portion '12 by. means of inlet and outlet pipes 15 and 16.

Inthe interior ofthe hood are two bafiles l7 and 18 somewhat smaller than the portions of the hood in which they are placed. The purpose of the battles is to direct the portion 12.

double walled conical member forming 192s. serialird. 648,466.

iagainst'the cooled inner surface of the cone shaped portion 12. Also a certain amount of thevapors, are condensed upon striking the lower bal'lle 17. This baffle is provided with aplurality of apertures 19 and with a central aperture 20. A stack or flue 24:lS provided at the apex of the cone shaped a funnel 21 extending through the cylindrical portion 13 into the tank. 'Eyes 22 and 23 areprovided to facilitate the handling otthe hood. V

In usingthe condensing hood, after the varnish ingredients have been cooked in the tank 10 the condensing hood is placed over the tank. Preferably this is done by moving the tank underneath the hood which. is

Thesolvent is added through in raised position and/then loweringthe hood into place over the tank. The solvent is then added through the funnel 21 a large portion of which, due-to the high tempera ture of the varnish, is immediately vapor,- izedg The solvent vapors, however, are condensed by the hood and returned to the tank. Only a very small amount otthe vapors remain uncondensed and escape through the stack 24., It is desirable to provide the stack to prevent the accumulation of vapors at the apex of the hood and resulting'danger of explosions. The cone shaped bafiles present inclined surfaces to the condensed vapors falling upon them and thus allow the con densate to freely return to the tank.

While I have described hiy invention as embodied; in concrete form and as operating'in a specific manner in accordance with the orovisions otthe patent statutes, it

'SllOUld be understood that I do not limit m I set forth in the annexed'claim.

What I claim as new and desire to'secure by Letters Patentof the United States, 13

The combination with a varnishcooking tank of a eondehsinghood arranged to be set on saidtank afterthe completion of the cooking operation when the varnish solvents are being added, said hood comprising a chamberthrough which a cooling liquidis spirit of my invention, the scope of which is ice circulated, a lower conical baflle provided with apertures mounted in said conical 1nen1- her in spaced relation With the 'IIIIIGT wall thereof, an upper eonieul bafile secured in sgaced relation with the inner Wall of said conical member whereby solvent Vapors aris- 'i'n "'froin said ta'nkare directed a ainstthe cooled surface of said hood to be'condensed,

fuurned thereby to said tank, and a flue at the apex 0i said conlcal member.

In witness whereof, I have hereunto set my hand this 26th day of June, 1923.

V HABMON L. SCHERMERHQRN. 

